Table 4 Overview of the alterations (patterns and secondary phases) observed in exposure experiments of model glass in real atmosphere.

Sheltered from rain

³¹

6–24

Deposits, irisations

Syngenite, gypsum, sylvite

N

¹²⁸

3–12

Deposits

Sulfates

Y

¹²⁷

4–12

Deposits, altered layer

Syngenite, gypsum

Y

²⁹

6–12

Deposits, layer depleted in K

Syngenite, gypsum, carbonates, nitrates

Y

¹⁷⁸

6

Deposits

K-Ca sulfates

N

^125,126

0.5–12

Deposits, irisations

Sulfates, nitrates

Y

⁹⁸

0.5–48

Deposits

Syngenite, gypsum, K carbonate

N

Unsheltered

³¹

6–24

Irisations, cracks, scales

N

¹²⁸

3–12

Altered layer

Y

³⁰

12–72

Altered layer

Y

¹²⁷

4–12

Irisations, cracks, scales

Y

^37,125,126

0.5–48

Loss of material, altered layer, irisations, cracks, scales, pits

Y

¹⁸⁰

10–20

Pits, irisations, deposits

N

¹⁶¹

3–12

Pits, irisations, deposits

N